There was a clarification comment on this cooling system overhaul parts list over here today:

Quote:

Originally Posted by BM109R

This is also my next DIY project. I've already replaced all the tensioners and belts recently so I only need the WP, thermostat, hoses and, expansion tank, fan, fan clutch radiator. My question is should I also include the vent hose that goes from expansion tank to radiator? I do not see that listed in any of the recommended parts list. I have attached a picture. The part number is 17111427156.

Quote:

Originally Posted by BM109R

Just saw the hose I was checking for on the list. On realoem it is called vent hose while on cn90's list it is the bypass hose.